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2011 19th European Signal Processing Conference最新文献

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Real-time FPGA implementation and measured performance of I/Q modulation based frequency synthesizer 基于I/Q调制的频率合成器的实时FPGA实现及性能测量
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42435
Juha Suviola, M. Allén, M. Valkama, M. Renfors
{"title":"Real-time FPGA implementation and measured performance of I/Q modulation based frequency synthesizer","authors":"Juha Suviola, M. Allén, M. Valkama, M. Renfors","doi":"10.5281/ZENODO.42435","DOIUrl":"https://doi.org/10.5281/ZENODO.42435","url":null,"abstract":"In this article, the design and implementation of mixed-signal frequency synthesis for wireless communications devices are addressed. The core of the synthesizer builds on digitally synthesized tunable low-frequency I/Q tone which is then shifted to the actual radio frequency range using I/Q modulation. An efficient real-time FPGA design of the digital synthesizer core is first provided. This is then also implemented in real time and connected to practical I/Q modulation hardware to measure the spectral characteristics of the overall synthesizer, in terms of phase noise and spurious frequencies. Specific emphasis in the implementation structure is on adaptive digital pre-distortion and calibration mechanisms that improve the limited sideband attenuation and local oscillator leakage of practical I/Q modulators. Measured results indicate that the reported design of the proposed architecture can provide more than 50dB spurious free dynamic range at the final synthesizer output.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126083416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Unsupervised restoration in Gaussian Pairwise Mixture Model 高斯配对混合模型的无监督恢复
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42336
S. Derrode, W. Pieczynski
{"title":"Unsupervised restoration in Gaussian Pairwise Mixture Model","authors":"S. Derrode, W. Pieczynski","doi":"10.5281/ZENODO.42336","DOIUrl":"https://doi.org/10.5281/ZENODO.42336","url":null,"abstract":"The idea behind the Pairwise Mixture Model (PMM) we propose in this work is to classify simultaneously two sets of observations by introducing a joint prior between the two corresponding classifications and some inter-dependence between the two observations. We address the Bayesian restoration of PMM using either MPM or MAP criteria, and an EM-based parameters estimation algorithm by extending the work done for classical Mixture Model (MM). Systematic experiments conducted on simulated data shows the effectiveness of the model when compared to the MM, both in supervised and unsupervised contexts.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126087381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Resource allocation between feedback and forward links: Impact on system performance and CSI 反馈链路和前向链路之间的资源分配:对系统性能和CSI的影响
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42550
Daniel Sacristán-Murga, A. Pascual-Iserte, P. Tradacete
{"title":"Resource allocation between feedback and forward links: Impact on system performance and CSI","authors":"Daniel Sacristán-Murga, A. Pascual-Iserte, P. Tradacete","doi":"10.5281/ZENODO.42550","DOIUrl":"https://doi.org/10.5281/ZENODO.42550","url":null,"abstract":"The performance of multiple-input multiple-output (MIMO) communication systems is greatly increased by exploiting channel state information (CSI) for the transmitter design. In systems where channel reciprocity does not hold, a limited feedback link can be used to send the CSI from the receiver to the transmitter. However, the resources for the feedback link come at the expense of resources for the forward link. This paper studies the trade-off between the accuracy of the feedback information and system performance. The optimum resource allocation is presented as the solution to an analytic equation for different beamforming transmission schemes to maximize the worst-case performance, in a framework including both time-division duplexing (TDD) and frequency-division duplexing (FDD).","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128936591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Low complexity RST invariant image recognition using Fourier Mellin Transform 基于Fourier Mellin变换的低复杂度RST不变图像识别
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42634
P. Ayyalasomayajula, S. Grassi, P. Farine
{"title":"Low complexity RST invariant image recognition using Fourier Mellin Transform","authors":"P. Ayyalasomayajula, S. Grassi, P. Farine","doi":"10.5281/ZENODO.42634","DOIUrl":"https://doi.org/10.5281/ZENODO.42634","url":null,"abstract":"In this paper we propose a low complexity method for Rotation, Scale and Translation (RST) invariant content-based image retrieval, suitable for a handheld image recognition device. The RST compensation method is based on Fourier-Mellin Transform (FMT) which we implement efficiently using log-polar grid interpolation. This RST compensation method is used in conjunction with an image recognition algorithm based on Discrete Cosine Transform (DCT) phase matching. A pre-selection algorithm is also added for decreasing the complexity. This algorithm is based on color proportions within concentric circular zones encompassing the edge pixels. The resulting RST invariant image recognition system was tested on 1500 pictograms and 1000 pictures with different RST conditions, showing an average recognition accuracy of 95.2% for pictograms and 96.9% for pictures.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127877728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Combinations of proportionate adaptive filters in acoustics: An application to active noise control 声学中比例自适应滤波器的组合:在主动噪声控制中的应用
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42483
J. Arenas-García, M. D. Diego, L. A. Azpicueta-Ruiz, M. Ferrer, Alberto González
{"title":"Combinations of proportionate adaptive filters in acoustics: An application to active noise control","authors":"J. Arenas-García, M. D. Diego, L. A. Azpicueta-Ruiz, M. Ferrer, Alberto González","doi":"10.5281/ZENODO.42483","DOIUrl":"https://doi.org/10.5281/ZENODO.42483","url":null,"abstract":"Proportionate adaptive schemes have been proposed to exploit sparsity and accelerate filter convergence in acoustic echo cancellation. Recently, combinations of adaptive filters have been extended to operate with proportionate schemes, in order to achieve more robust operation when the actual degree of sparsity of the optimal solution is unknown. Furthermore, it is possible to exploit the asymmetric distribution of adaptation energy in proportionate schemes to reduce the overall steady-state misadjustment. In this contribution, we explain how these novel adaptive filtering structures, which have been proposed and tested mainly for echo cancellation, can also be effectively extended to improve the usual performance trade-offs that appear in active noise control scenarios by introducing some minor modifications. Experimental results in realistic scenarios show that the proposed schemes provide an interesting alternative to the traditional use of a single adaptive filter.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127947422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
An algebraic derivative-based method for R wave detection 基于代数导数的R波检测方法
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42479
S. Rezk, Cédric Join, S. E. Asmi
{"title":"An algebraic derivative-based method for R wave detection","authors":"S. Rezk, Cédric Join, S. E. Asmi","doi":"10.5281/ZENODO.42479","DOIUrl":"https://doi.org/10.5281/ZENODO.42479","url":null,"abstract":"In this paper, a new robust method for R wave detection in ECG signal is proposed by using algebraic derivative estimation based technique. In fact, this new and efficient method relies on differential algebra, non-commutative algebra together with operational calculus. This technique allows noisy signal to be filtered via iterated time integrals and R wave slope to be emphasized. The ECG signal is then Hilbert transformed to be enhanced and threshold compared. The performance of the algorithm was tested by using the annotated records of MIT-BIH Arrhythmia Database. The robustness of the proposed R wave detector in presence of noise was also tested according to records from MIT-BIH Noise Stress Test Database. The overall performance is quite good even SNR as low as 6 dB.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125920135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 21
A BSS-based approach for localization of simultaneous speakers in reverberant conditions 基于bss的混响条件下同声说话人定位方法
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42518
H. R. Abutalebi, Hedieh Heli, D. Korchagin, H. Bourlard
{"title":"A BSS-based approach for localization of simultaneous speakers in reverberant conditions","authors":"H. R. Abutalebi, Hedieh Heli, D. Korchagin, H. Bourlard","doi":"10.5281/ZENODO.42518","DOIUrl":"https://doi.org/10.5281/ZENODO.42518","url":null,"abstract":"In this paper, we address the localization of simultaneous speakers by means of Blind Source Separation (BSS) based algorithms. Considering BSS demixing filters as some blind null beamformer and producing an acoustical map from them, source localization can be achieved by identifying the local minima of this acoustical map. To improve the performance of this method in reverberant environments, we have proposed to replace the demixing filter with one, corresponding to the direct path only. This is done by keeping only the largest coefficient in each demixing filter and neglecting the other coefficients. Besides, the proposed method reduces the computational complexity. To further improve the computational efficiency of the localization method, we have also proposed the limitation of the frequency range within averaging procedure. The experimental results demonstrate improved accuracy and efficiency of the proposed method in the localization of multiple simultaneous sound sources in reverberant environments.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126935533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Performance analysis of a distributed Robbins-Monro algorithm for sensor networks 分布式robins - monro算法在传感器网络中的性能分析
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42562
P. Bianchi, G. Fort, W. Hachem, J. Jakubowicz
{"title":"Performance analysis of a distributed Robbins-Monro algorithm for sensor networks","authors":"P. Bianchi, G. Fort, W. Hachem, J. Jakubowicz","doi":"10.5281/ZENODO.42562","DOIUrl":"https://doi.org/10.5281/ZENODO.42562","url":null,"abstract":"This paper investigates the rate of convergence of a distributed Robbins-Monro algorithm for sensor networks. The algorithm under study consists of two steps: a local Robbins-Monro step at each sensor and a gossip step that drives the network to a consensus. Under verifiable sufficient conditions, we give an explicit rate of convergence for this algorithm and provide a conditional Central Limit Theorem. Our results are applied to distributed source localization.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"47 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124387577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Improved interference approximation method for preamble-based channel estimation in FBMC/OQAM FBMC/OQAM中基于前导信道估计的改进干扰逼近方法
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42712
Eleftherios Kofidis, D. Katselis
{"title":"Improved interference approximation method for preamble-based channel estimation in FBMC/OQAM","authors":"Eleftherios Kofidis, D. Katselis","doi":"10.5281/ZENODO.42712","DOIUrl":"https://doi.org/10.5281/ZENODO.42712","url":null,"abstract":"Filter bank-based multicarrier modulation (FBMC) using offset quadrature amplitude modulation (OQAM), known as FBMC/OQAM (or OFDM/OQAM), provides an attractive alternative to the conventional cyclic prefix-based orthogonal frequency division multiplexing (CP-OFDM), especially in terms of increased robustness to frequency offset and Doppler spread, and high bandwidth efficiency. It suffers, however, from an inherent (intrinsic) imaginary intercarrier/inter-symbol interference that complicates signal processing tasks such as channel estimation (CE). Recently, the so-called interference approximation method (IAM) was proposed for preamble-based CE. It relies on the knowledge of the pilot's neighborhood to approximate this interference and constructively exploit it in simplifying CE and improving its performance. The IAM preamble with nulls at the neighboring time instants that results in optimum CE performance was recently reported. This paper investigates an extended version of it, which can provide significant improvement through an appropriate exploitation of the interfering symbols from neighboring time instants as well. Simulation results are presented that compare the methods, with each other and with CP-OFDM, in both mildly and highly frequencyselective channels.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131077779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 52
A 1 Gbin/s CABAC encoder for H.264/AVC 用于H.264/AVC的1 Gbin/s CABAC编码器
2011 19th European Signal Processing Conference Pub Date : 2011-08-29 DOI: 10.5281/ZENODO.42535
Wei Fei, Dajiang Zhou, S. Goto
{"title":"A 1 Gbin/s CABAC encoder for H.264/AVC","authors":"Wei Fei, Dajiang Zhou, S. Goto","doi":"10.5281/ZENODO.42535","DOIUrl":"https://doi.org/10.5281/ZENODO.42535","url":null,"abstract":"In this paper, we propose a 1 Gbin/s context-based adaptive binary arithmetic coding (CABAC) encoder architecture for beyond-HDTV applications. CABAC is a crucial part in H.264/AVC main and high profiles that provides a great compression ratio at the expense of high computational complexity. And it is also considered as a very efficient coding method in the developing high-efficiency video coding (HEVC) standard. We try to accelerate the CABAC encoder to provide a high throughput to meet the requirement of beyond-HDTV video. Our design includes the binarization, context modeling and binary arithmetic encoding (BAE) parts and achieves a throughput of 4 bins per cycle. The synthesis result using SMIC 90nm shows that the logic gate count is 36.2K in all and the encoder engine can work at a maximum frequency of 279MHz. Thus the overall throughput can reach over 1 Gbin/s. In our design, the 460 contexts are assigned to 6 SRAMs to attain efficient context modeling. And the binarization part is also optimized to enhance the throughput with low hardware cost.","PeriodicalId":331889,"journal":{"name":"2011 19th European Signal Processing Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133089326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
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